2" PREMIUM EGGCRATE DESIGN ACOUSTICS is an effective sound deadener for standing waves and flutter echoes, especially when used with ACOUSTIC CORNER BASS TRAPS. It also reduces slap-back and room ring when used in medium-sized areas like isolation booths, recording booths, control rooms, and sound studios.:: With its straight-cut sides, these Pyramid Acoustic Foams can easily be arranged side by side on a flat surface area (walls). ::: FOR DECORATIVE PURPOSES, can also be arranged side-by-side with the 2-inch ACOUSTIC WEDGES AND PYRAMIDS.